Towards an understanding of the Of ? p star HD 191612: phase-resolved multiwavelength observations

Nazé, Yaël; Rauw, Grégor; Pollock, A. M. T.; Walborn, N. R.; Howarth, I. D.

doi:10.1111/j.1365-2966.2006.11270.x

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Towards an understanding of the Of ? p star HD 191612: phase-resolved multiwavelength observations

Nazé, Yaël; Rauw, Grégor; Pollock, A. M. T. et al.

2007 • In Monthly Notices of the Royal Astronomical Society, 375 (1), p. 145-153

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https://hdl.handle.net/2268/1883

DOI
10.1111/j.1365-2966.2006.11270.x

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Keywords :

stars : early-type; stars : individual : HD 191612; X-rays : individual : HD 191612; X-rays : stars

Abstract :

[en] We present the analysis of phase-resolved X-ray and optical observations of the peculiar hot star HD 191612 (Of ? p). This star is known to display line-profile variations that are recurrent with a period of 538 d and its spectrum was found to present the signature of a magnetic field. In the X-rays, it is slightly overluminous compared to the canonical L-X/L-BOL) relation and appears brighter when the optical lines are strongest. Our XMM-Newton observations further reveal that the X-ray spectrum of HD 191612 exhibits rather broad lines and is dominated by a 'cool' (0.2-0.6 keV) thermal component, two characteristics at odds with the proposed magnetic rotator model. We also report for the first time the low-level variability of the metallic (absorption/emission) lines and He ii absorptions that appear to be associated with radial-velocity shifts. Finally, we compare our results with observations of the early-type stars and discuss several possible scenarios.

Disciplines :

Earth sciences & physical geography

Author, co-author :

Nazé, Yaël ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE)

Rauw, Grégor ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE)

Pollock, A. M. T.

Walborn, N. R.

Howarth, I. D.

Language :

English

Title :

Towards an understanding of the Of ? p star HD 191612: phase-resolved multiwavelength observations

Publication date :

11 February 2007

Journal title :

Monthly Notices of the Royal Astronomical Society

ISSN :

0035-8711

eISSN :

1365-2966

Publisher :

Blackwell Publishing, Oxford, United Kingdom

Volume :

375

Issue :

Pages :

145-153

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://arxiv.org/abs/astro-ph/0611230

Available on ORBi :

since 03 December 2008

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Andrillat Y., Vreux J.-M., 1975, A&A, 41, 133
Barannikov A. A., 1999, Astron. Let., 25, 169
Bohlin R. C., Savage B. D., Drake J. F., 1978, ApJ, 224, 132
Cohen D. H., de Messières G. E., MacFarlane J. J., Miller N. A., Cassinelli J. P., Owocki S. P., Liedahl D. A., 2003, ApJ, 586, 495
Cohen D. H., Leutenegger M. A., Grizzard K. T., Reed C. L., Kramer R. H., Owocki S. P., 2006, MNRAS, 368, 1905
Donati J.-F., Howarth I. D., Bouret J.-C., Petit P., Catala C., Landstreet J., 2006a, MNRAS, 365, L6
Donati J.-F. et al., 2006b, MNRAS, 370, 629
Fullerton A. W., Gies D. R., Bolton C. T., 1996, ApJS, 103, 475
Gagné M., Oksala M. E., Cohen D. H., Tonnesen S. K., ud-Doula A., Owocki S. P., Townsend R. H. D., MacFarlane J. J., 2005, ApJ, 628, 986
Gies D. R., 1987, ApJS, 64, 545
Humphreys R. M., Mc Elroy D. B., 1984, ApJ, 284, 565
Hutchings J. B., 1975, ApJ, 200, 122
Kaastra J. S., 1992, An X-Ray Spectral Code for Optically Thin Plasmas. Internal SRON-Leiden Rep., Version 2.0
Kahn S. M., Leutenegger M. A., Cottam J., Rauw G., Vreux J.-M., den Boggende A. J. F., Mewe R., Güdel M., 2001, A&A, 365, L312
Koen C., Eyer L., 2002, MNRAS, 331, 45
Kramer R. H., Cohen D. H., Owocki S. P., 2003, ApJ, 592, 532
Lemen J. R., Mewe R., Schrijver C. J., Fludra A., 1989, ApJ, 341, 474
Mewe R., Raassen A. J J., Cassinelli J. P., van der Hucht K. A., Miller N. A., Güdel M., 2003, A&A, 398, 203
Nazé Y., 2004, PhD thesis, Université de Liège
Nazé Y., Vreux J.-M., Rauw G., 2001, A&A, 372, 195
Nazé Y., Rauw G., Vreux J.-M., De Becker M., 2004, A&A, 417, 667
Nazé Y., Barbieri C., Segafredo A., Rauw G., De Becker M., 2006, IBVS, 5693
Pollock A. M. T., Corcoran M. F., Stevens I. R., Williams P. M., 2005, ApJ, 629, 482
Rauw G., Morrison N. D., Vreux J.-M., Gosset E., Mulliss C. L., 2001, A&A, 366, 585
Sana H., Rauw G., Nazé Y., Gösset E., Vreux J.-M. 2006, MNRAS, 372, 661
Savage B. D., Massa D., Meade M., Wesselius P. R., 1985, ApJS, 59, 397
Schulz N. S., Canizares C. R., Huenemoerder D., Lee J. C., 2000, ApJ, 545, L135
Siess L., Dufour E., Forestini M., 2000, A&A, 358, 593
Singh K. P., White N. E., Drake S. A., 1996, ApJ, 456, 766
Stahl O., Wolf B., Gäng T., Gummersbach C. A., Kaufer A., Kovacs J., 1993, A&A, 274, L29
Underhill A. B., 1994, ApJ, 420, 869
Vreux J.-M., Conti P. S., 1979, ApJ, 228, 220
Walborn N. R., 1972, AJ, 77, 312
Walborn N. R., 1973, AJ, 78, 1067
Walborn N. R., 1981, ApJ, 243, L37
Walborn N. R., 2001, in Gull T. R., Johannson S., Davidson K., eds, ASP Conf. Proc. Vol. 242, Eta Carinae and Other Mysterious Stars: The Hidden Opportunities of Emission Spectroscopy. Astron. Soc. Pac., San Francisco, p. 217
Walborn N. R., Howarth I. D., Herrero A., Lennon D. J., 2003, ApJ, 588, 1025
Walborn N. R. et al., 2004, ApJ, 617, L61
Waldron W. L., Cassinelli J. P., 2001, ApJ, 548, L45